<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>属性选择器</title>
    <style>
        [type] {
            color: red;
        }

        [type=password] {
            color: blue;
        }
    </style>
</head>
<body>
用户名：<input type="text"/> <br/>
密码：<input type="password"/> <br/>
邮箱：<input type="email"/> <br/>
</body>
</html>